Drain insert



FIG. 1 is a top facing perspective view of a drain insert spaced-apart from a drain cover. The drain cover shown in broken lines forms no part of the claimed invention;

FIG. 2 is a top facing perspective view of a drain insert;

FIG. 3 is a top view of a drain insert;

FIG. 4 is a bottom view of a drain insert;

FIG. 5 is a front view of a drain insert, the rear view being the same as the front view; and,

FIG. 6 is a right side view of a drain insert, the left side view being the same as the right side view. 

We claim the ornamental design for the drain insert, as shown and described. 